I got an interesting request, does anyone here use a Specialized saddle with the SWAT feature? I stopped riding Specialized after I broke three Toupe shells each after just a single year of riding. I never owned one with the SWAT inserts. I also can't find anything other than a couple of bags that use this mounting system. My big questions are what size bolts does it use? What is the center to center dimension of those bolts? What is the profile of the flat area around the bolts? And, is the SWAT mounting plane parallel to the ground when a Specialized saddle is mounted in a typical ride orientation?